Laos in september: average Weather, Temperature and Climate, Where to go?
Weather in Laos in september 2025
In this section, you have access to the weather forecast for september for most popular cities in Laos. These predictions are statistics for the month of september from weather reports for many years. The percentage indicates the probability of having the weather indicated.
Average weather in september in Vientiane
tolerable weather UV index: 7
Weather at 6am
77°F
Moderate rain at times
32% of time
24%
20%
14%
Weather at 12pm
90°F
Moderate rain at times
42% of time
19%
17%
16%
Weather at 6pm
81°F
Moderate rain at times
31% of time
29%
19%
15%
Weather at 3am
76°F
35%
23%
16%
14%
More information about the weather in Vientiane in september
Where to go in Laos in september?
Where to go in Laos in september: destination map
Where to go in each region in september?
| Central of Laos (Vientiane, Vang Vieng, Thakhek...) | 81°F to 90°F | 14 à 19 days | tolerable weather |
| North of Laos (Luang Prabang, Nong Kiau, Luang Namtha...) | 81°F to 92°F | 10 à 20 days | tolerable weather* |
| South of Laos (Pakse, Savannakhet, Khong island (Don Khong)...) | 86°F to 90°F | 18 à 26 days | bad weather* |
Where should you go in Laos in september when it comes to the weather?
Remember:
The climate in Laos in september ranges from tolerable to bad depending on the region and city.
September is not the best month to visit Laos. The weather in Nong Kiau, Louang Namtha, Houei Sai, Luang Prabang, Thakhek and Vientiane is just ok. The sun is not there all the time and you might make you wet by rain frequently. However, if you don't plan a beach and relaxation trip but rather nature excursions, this climate may be good enough for you. In addition, there are definitely fewer tourists at this time.
It's even worse in Phonsavan, Vang Vieng, Pakse, Savannakhet and Khong island (Don Khong) and surrounding areas where the climate is very bad. It is not advisable to visit these areas this month.
Climate in Laos in september
Climate in Vientiane in september
In the month of september, the mean temperature in Vientiane is 85°F (maximum temperature is 90°F and minimum temperature is 77°F). The climate is very hot here in september. With 14.3in over 17 days, the weather is rather to rain throughout your holidays. So remember to bring rain clothes.
With a correct climate, the month of september is okay (but not good month) for traveling in this locality in Laos.
| September | |||
| Average temperature | 85°F | ||
| Highest temperature | 90°F | ||
| Lowest temperature | 77°F | ||
| Rainfall | 14.3in | ||
| Number of days with rainfall | 17 day(s) (56%) | ||
| Humidity | 93% | ||
| Daily sunshine hours | 12 | ||
| Cloud cover | 45% | ||
| Length of day | 12:14 | ||
| Our opinion at whereandwhen.net | tolerable |
Climate in Luang Prabang in september
In september, maximum temperature is 92°F and minimum temperature is 74°F (for an average temperature of 83°F). The climate is burning in that locality in this month. With 6.7in over 10 days, you will suffer the rain throughout your vacations. So remember to pack clothes for rain.
With proper weather, the month of september is okay (but not good time) for traveling there in Laos.
| September | |||
| Average temperature | 83°F | ||
| Highest temperature | 92°F | ||
| Lowest temperature | 74°F | ||
| Rainfall | 6.7in | ||
| Number of days with rainfall | 10 day(s) (35%) | ||
| Humidity | 95% | ||
| Daily sunshine hours | 12 | ||
| Cloud cover | 52% | ||
| Length of day | 12:15 | ||
| Our opinion at whereandwhen.net | good |
Climate in Vang Vieng in september
In the month of september, the mean temperature in Vang Vieng is 79°F (maximum temperature is 90°F and minimum temperature is 68°F). The climate is very hot there in this month. With 13.3in over 19 days, the weather is rather to rain during your journey. So remember to bring rain clothes.
| September | |||
| Average temperature | 79°F | ||
| Highest temperature | 90°F | ||
| Lowest temperature | 68°F | ||
| Rainfall | 13.3in | ||
| Number of days with rainfall | 19 day(s) (64%) | ||
| Humidity | 95% | ||
| Daily sunshine hours | 12 | ||
| Cloud cover | 52% | ||
| Length of day | 12:15 | ||
| Our opinion at whereandwhen.net | tolerable |
Climate in Khong island (Don Khong) in september
In the month of september, maximum temperature is 88°F and minimum temperature is 77°F (for an average temperature of 83°F). The climate is very warm in that locality in the month of september. With 17.5in over 24 days, you may find yourself often in the rain throughout your stay. Consider to bring Rain coats.
| September | |||
| Average temperature | 83°F | ||
| Highest temperature | 88°F | ||
| Lowest temperature | 77°F | ||
| Rainfall | 17.5in | ||
| Number of days with rainfall | 24 day(s) (79%) | ||
| Humidity | 96% | ||
| Daily sunshine hours | 10 | ||
| Cloud cover | 61% | ||
| Length of day | 12:12 | ||
| Our opinion at whereandwhen.net | bad |
Climate in Luang Namtha in september
In september, maximum temperature is 81°F and minimum temperature is 65°F (for an average temperature of 74°F). The climate is burning in this location in the month of september. With 10.3in over 15 days, rainfall can happen throughout your journey. But this is rather reasonably and it will not be continuous.
With a correct climate, the month of september is okay (but not good month) for traveling in this city.
| September | |||
| Average temperature | 74°F | ||
| Highest temperature | 81°F | ||
| Lowest temperature | 65°F | ||
| Rainfall | 10.3in | ||
| Number of days with rainfall | 15 day(s) (49%) | ||
| Humidity | 96% | ||
| Daily sunshine hours | 11 | ||
| Cloud cover | 57% | ||
| Length of day | 12:16 | ||
| Our opinion at whereandwhen.net | tolerable |
All cities in Laos in september
| Vientiane in september | tolerable weather |
| Luang Prabang in september | good weather |
| Vang Vieng in september | tolerable weather |
| Khong island (Don Khong) in september | bad weather |
| Luang Namtha in september | tolerable weather |
| Nong Kiau in september | bad weather |
| Pakse in september | very bad weather |
| Savannakhet in september | tolerable weather |
| Thakhek in september | tolerable weather |
| Houei Sai in september | tolerable weather |
| Phonsavan in september | tolerable weather |
Weather data for Laos in september:
Weather data for Laos in september is derived from an average of the weather forecast since 2009 in Laos. There is a margin of error and these forecasts are to be considered as general information only. The weather in Laos can vary slightly from year to year, but these predictions should limit surprises. So you can pack your bags and check when is the best time to go to Laos.